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[client] egl: make native HDR encoding-safe

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Request true floating-point EGL configs for scRGB and expose the native
encodings supported by the selected surface. Fall back to software HDR
mapping when the surface cannot represent the incoming wire format.

Resample PQ in linear light, keep SDR-only effects out of native PQ
chains, and consume the cursor-specific white level without changing
binary monochrome cursor mask operations.
This commit is contained in:
Geoffrey McRae
2026-07-19 04:42:30 +10:00
parent 20225f05d1
commit 70b795c5ba
10 changed files with 160 additions and 42 deletions
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28
client/src/main.c
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@@ -459,8 +459,8 @@ int main_cursorThread(void * unused)
memcpy(cursor, msg.mem, neededSize);
lgmpClientMessageDone(g_state.pointerQueue);
g_cursor.guest.visible =
msg.udata & CURSOR_FLAG_VISIBLE;
if (msg.udata & CURSOR_FLAG_VISIBLE_VALID)
g_cursor.guest.visible = msg.udata & CURSOR_FLAG_VISIBLE;
if (msg.udata & CURSOR_FLAG_SHAPE)
{
@@ -500,6 +500,11 @@ int main_cursorThread(void * unused)
g_state.lgr->ops.onMouseColorTransform(g_state.lgr, transform);
}
if ((msg.udata & CURSOR_FLAG_VISIBLE_VALID) &&
cursor->sdrWhiteLevel && g_state.lgr->ops.onMouseWhiteLevel)
g_state.lgr->ops.onMouseWhiteLevel(
g_state.lgr, cursor->sdrWhiteLevel);
if (msg.udata & CURSOR_FLAG_POSITION)
{
bool valid = g_cursor.guest.valid;
@@ -764,11 +769,28 @@ int main_frameThread(void * unused)
LG_UNLOCK(g_state.lgrLock);
break;
}
// Renderers which expose HDR surface capabilities must match the wire
// encoding. Legacy renderers do not advertise this interface, so retain
// their existing display-server behaviour rather than silently forcing
// them through a conversion path they may not implement.
const bool rendererSupportsNativeHDR = !lgrFormat.hdr ||
!g_state.lgr->ops.supports || RENDERER(supports,
lgrFormat.hdrPQ ? LG_SUPPORTS_HDR_PQ : LG_SUPPORTS_HDR_SCRGB);
LG_UNLOCK(g_state.lgrLock);
if (g_state.ds->setHDRImageDescription)
{
if (!g_state.ds->setHDRImageDescription(&lgrFormat))
if (lgrFormat.hdr && !rendererSupportsNativeHDR)
{
LG_RendererFormat sdrSurfaceFormat = lgrFormat;
sdrSurfaceFormat.hdr = false;
g_state.ds->setHDRImageDescription(&sdrSurfaceFormat);
DEBUG_WARN("Renderer surface cannot represent the native HDR "
"encoding; using software HDR mapping");
atomic_store(&g_state.hdrDescFailed, true);
}
else if (!g_state.ds->setHDRImageDescription(&lgrFormat))
{
DEBUG_WARN("Display server failed to apply HDR image description");
atomic_store(&g_state.hdrDescFailed, true);